Councilmember Phil Mendelson has scheduled a hearing for Wednesday at the John A. Wilson Building.

District officials say inaccurately calibrated blood-alcohol machines have called into question hundreds of drunken driving convictions. Police have stopped using the machines and are relying on urine tests instead to build cases against suspected drunken drivers. Cases have also been dismissed.

Mendelson earlier directed the office of the Attorney General to establish a timeline for fixing the problem and to report back on any progress.